关键词: 拆除爆破, 钢筋混凝土拱桥, 数值模拟, 分离式共节点模型

Abstract: In order to ensure Ceheng ledges bridge demolition blasting is carried out smoothly, a common node separate model which is considering the mechanical difference between steel and concrete during blasting was established based on the ANSYS/LS-DYNA platform, then the blasting program before demolition blasting was simulated.The simulation results show that the program which shallow hole blasting and deep hole blasting in combination is entirely feasible, thus this program for blasting construction is used.Through the comparative analysis with the actual blasting process, the numerical simulation technique can verify and optimize the blasting program.It can effectively guide the blasting construction, and it has important theoretical significance and practical value.

Key words: Demolition blasting, Reinforced concrete arched bridge, Numerical simulation, Common node separate model